/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  s_conf.h: A header for the configuration functions.
 *
 *  Copyright (C) 2005 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id: s_conf.h 505 2007-07-16 16:47:50Z jon $
 */

#ifndef INCLUDED_s_conf_h
#define INCLUDED_s_conf_h
#include "setup.h"
#ifdef HAVE_LIBCRYPTO
#include <openssl/rsa.h>
#endif
#include "fileio.h"		/* FBFILE */
#include "ircd_defs.h"
#include "motd.h"		/* MessageFile */
#include "client.h"
#include "hook.h"
#include "pcre.h"

struct Client;
struct DNSReply;
struct hostent;

extern FBFILE *conf_fbfile_in;
extern struct Callback *client_check_cb;

typedef enum
{
	CONF_TYPE,
	CLASS_TYPE,
	OPER_TYPE,
	CLIENT_TYPE,
	SERVER_TYPE,
	HUB_TYPE,
	LEAF_TYPE,
	KLINE_TYPE,
	DLINE_TYPE,
	EXEMPTDLINE_TYPE,
	CLUSTER_TYPE,
	RKLINE_TYPE,
	RXLINE_TYPE,
	XLINE_TYPE,
	ULINE_TYPE,
	GLINE_TYPE,
	CRESV_TYPE,
	NRESV_TYPE,
	GDENY_TYPE
} ConfType;

struct split_nuh_item
{
	dlink_node node;

	char *nuhmask;
	char *nickptr;
	char *userptr;
	char *hostptr;

	size_t nicksize;
	size_t usersize;
	size_t hostsize;
};

struct ConfItem
{
	char *name;		/* Primary key */
	pcre *regexpname;
	dlink_node node;	/* link into known ConfItems of this type */
	unsigned int flags;
	ConfType type;
};

/*
 * MatchItem - used for XLINE and ULINE types
 */
struct MatchItem
{
	char *user;		/* Used for ULINE only */
	char *host;		/* Used for ULINE only */
	char *reason;
	char *oper_reason;
	int action;		/* used for uline */
	int count;		/* How many times this matchitem has been matched */
	int ref_count;		/* How many times is this matchitem in use */
	int illegal;		/* Should it be deleted when possible? */
	time_t hold;		/* Hold action until this time (calendar time) */
};

struct AccessItem
{
	dlink_node node;
	unsigned int status;	/* If CONF_ILLEGAL, delete when no clients */
	unsigned int flags;
	unsigned int modes;
	int clients;		/* Number of *LOCAL* clients using this */
	struct irc_ssaddr my_ipnum;	/* ip to bind to for outgoing connect */
	struct irc_ssaddr ipnum;	/* ip to connect to */
	char *host;		/* host part of user@host */
	char *passwd;
	char *spasswd;		/* Password to send. */
	char *reason;
	char *oper_reason;
	char *user;		/* user part of user@host */
	int port;
	char *fakename;		/* Mask name */
	time_t hold;		/* Hold action until this time (calendar time) */
	struct ConfItem *class_ptr;	/* Class of connection */
	struct DNSQuery *dns_query;
	int aftype;
#ifdef HAVE_LIBCRYPTO
	char *rsa_public_key_file;
	RSA *rsa_public_key;
	struct EncCapability *cipher_preference;
#endif
	pcre *regexuser;
	pcre *regexhost;
};

struct ClassItem
{
	long max_sendq;
	int con_freq;
	int ping_freq;
	int ping_warning;
	int max_total;
	int max_local;
	int max_global;
	int max_ident;
	int max_perip;
	int curr_user_count;
	int cidr_bitlen_ipv4;
	int cidr_bitlen_ipv6;
	int number_per_cidr;
	dlink_list list_ipv4;	/* base of per cidr ipv4 client link list */
	dlink_list list_ipv6;	/* base of per cidr ipv6 client link list */
	int active;
};

struct CidrItem
{
	struct irc_ssaddr mask;
	int number_on_this_cidr;
	dlink_node node;
};

#define ConFreq(x)	((x)->con_freq)
#define PingFreq(x)	((x)->ping_freq)
#define PingWarning(x)  ((x)->ping_warning)
#define MaxTotal(x)	((x)->max_total)
#define MaxGlobal(x)	((x)->max_global)
#define MaxLocal(x)	((x)->max_local)
#define MaxIdent(x)	((x)->max_ident)
#define MaxPerIp(x)	((x)->max_perip)
#define MaxSendq(x)	((x)->max_sendq)
#define CurrUserCount(x) ((x)->curr_user_count)
#define CidrBitlenIPV4(x)	((x)->cidr_bitlen_ipv4)
#define CidrBitlenIPV6(x)	((x)->cidr_bitlen_ipv6)
#define NumberPerCidr(x) ((x)->number_per_cidr)

#define ClassPtr(x)      ((x)->class_ptr)


#define CONF_ILLEGAL            0x80000000
#define CONF_RESERVED           0x00000001
#define CONF_CLIENT             0x00000002
#define CONF_SERVER             0x00000004
#define CONF_OPERATOR           0x00000008
#define CONF_KILL               0x00000010
#define CONF_KLINE              CONF_KILL
#define CONF_CLASS              0x00000020
#define CONF_LEAF               0x00000040
#define CONF_LISTEN_PORT        0x00000080
#define CONF_HUB                0x00000100
#define CONF_EXEMPTKLINE        0x00000200
#define CONF_NOLIMIT            0x00000400
#define CONF_DLINE              0x00000800
#define CONF_XLINE              0x00001000
#define CONF_ULINE              0x00002000
#define CONF_EXEMPTDLINE        0x00004000
#define CONF_GLINE              0x00008000

#define CONF_SERVER_MASK       CONF_SERVER
#define CONF_CLIENT_MASK       (CONF_CLIENT | CONF_OPERATOR | CONF_SERVER_MASK)

/* XXX temporary hack */
#define CONF_CRESV	        0x80000001
#define CONF_NRESV	        0x80000002

#define IsConfIllegal(x)	((x)->status & CONF_ILLEGAL)
#define SetConfIllegal(x)	((x)->status |= CONF_ILLEGAL)
#define IsConfServer(x)		((x)->status == CONF_SERVER)
#define SetConfServer(x)	((x)->status = CONF_SERVER)
#define IsConfOperator(x)	((x)->status & CONF_OPERATOR)
#define IsConfHub(x)		((x)->status == CONF_HUB)
#define SetConfHub(x)		((x)->status = CONF_HUB)
#define IsConfLeaf(x)		((x)->status == CONF_LEAF)
#define SetConfLeaf(x)		((x)->status = CONF_LEAF)
#define IsConfHubOrLeaf(x)	((x)->status & (CONF_HUB|CONF_LEAF))
#define IsConfKill(x)		((x)->status == CONF_KILL)
#define IsConfClient(x)		((x)->status & CONF_CLIENT)
#define IsConfTypeOfClient(x)	((x)->status & CONF_CLIENT_MASK)
#define IsConfUline(x)		((x)->status & CONF_ULINE)
#define IsConfXline(x)		((x)->status & CONF_XLINE)
#define IsConfGline(x)          ((x)->status == CONF_GLINE)

/* AccessItem->flags */

/* Generic flags... */
/* access flags... */
#define CONF_FLAGS_DO_IDENTD            0x00000001
#define CONF_FLAGS_LIMIT_IP             0x00000002
#define CONF_FLAGS_NO_TILDE             0x00000004
#define CONF_FLAGS_NEED_IDENTD          0x00000008
/*                                      0x00000010 */
#define CONF_FLAGS_NOMATCH_IP           0x00000020
#define CONF_FLAGS_EXEMPTKLINE          0x00000040
#define CONF_FLAGS_NOLIMIT              0x00000080
#define CONF_FLAGS_IDLE_LINED           0x00000100
#define CONF_FLAGS_SPOOF_IP             0x00000200
#define CONF_FLAGS_SPOOF_NOTICE         0x00000400
#define CONF_FLAGS_REDIR                0x00000800
#define CONF_FLAGS_EXEMPTGLINE          0x00001000
#define CONF_FLAGS_RESTRICTED           0x00002000
#define CONF_FLAGS_CAN_FLOOD            0x00100000
#define CONF_FLAGS_NEED_PASSWORD        0x00200000
#define CONF_FLAGS_WEBIRC	        0x02000000
/* server flags */
#define CONF_FLAGS_ALLOW_AUTO_CONN      0x00004000
#define CONF_FLAGS_LAZY_LINK            0x00008000
#define CONF_FLAGS_ENCRYPTED            0x00010000
#define CONF_FLAGS_COMPRESSED           0x00020000
#define CONF_FLAGS_TEMPORARY            0x00040000
#define CONF_FLAGS_CRYPTLINK            0x00080000
#define CONF_FLAGS_BURST_AWAY           0x00400000
#define CONF_FLAGS_EXEMPTRESV           0x00800000
#define CONF_FLAGS_TOPICBURST           0x01000000

/* Macros for struct AccessItem */
#define IsLimitIp(x)            ((x)->flags & CONF_FLAGS_LIMIT_IP)
#define IsNoTilde(x)            ((x)->flags & CONF_FLAGS_NO_TILDE)
#define IsConfCanFlood(x)       ((x)->flags & CONF_FLAGS_CAN_FLOOD)
#define IsNeedPassword(x)       ((x)->flags & CONF_FLAGS_NEED_PASSWORD)
#define IsConfWebIrc(x)		((x)->flags & CONF_FLAGS_WEBIRC)
#define IsNeedIdentd(x)         ((x)->flags & CONF_FLAGS_NEED_IDENTD)
#define IsNoMatchIp(x)          ((x)->flags & CONF_FLAGS_NOMATCH_IP)
#define IsConfExemptKline(x)    ((x)->flags & CONF_FLAGS_EXEMPTKLINE)
#define IsConfExemptLimits(x)   ((x)->flags & CONF_FLAGS_NOLIMIT)
#define IsConfExemptGline(x)    ((x)->flags & CONF_FLAGS_EXEMPTGLINE)
#define IsConfExemptResv(x)     ((x)->flags & CONF_FLAGS_EXEMPTRESV)
#define IsConfIdlelined(x)      ((x)->flags & CONF_FLAGS_IDLE_LINED)
#define IsConfDoIdentd(x)       ((x)->flags & CONF_FLAGS_DO_IDENTD)
#define IsConfDoSpoofIp(x)      ((x)->flags & CONF_FLAGS_SPOOF_IP)
#define IsConfSpoofNotice(x)    ((x)->flags & CONF_FLAGS_SPOOF_NOTICE)
#define IsConfRestricted(x)     ((x)->flags & CONF_FLAGS_RESTRICTED)
#define IsConfEncrypted(x)      ((x)->flags & CONF_FLAGS_ENCRYPTED)
#define SetConfEncrypted(x)	((x)->flags |= CONF_FLAGS_ENCRYPTED)
#define ClearConfEncrypted(x)	((x)->flags &= ~CONF_FLAGS_ENCRYPTED)
#define IsConfCompressed(x)     ((x)->flags & CONF_FLAGS_COMPRESSED)
#define SetConfCompressed(x)    ((x)->flags |= CONF_FLAGS_COMPRESSED)
#define ClearConfCompressed(x)  ((x)->flags &= ~CONF_FLAGS_COMPRESSED)
#define IsConfCryptLink(x)      ((x)->flags & CONF_FLAGS_CRYPTLINK)
#define SetConfCryptLink(x)     ((x)->flags |= CONF_FLAGS_CRYPTLINK)
#define ClearConfCryptLink(x)   ((x)->flags &= ~CONF_FLAGS_CRYPTLINK)
#define IsConfLazyLink(x)       ((x)->flags & CONF_FLAGS_LAZY_LINK)
#define SetConfLazyLink(x)      ((x)->flags = CONF_FLAGS_LAZY_LINK)
#define ClearConfLazyLink(x)	((x)->flags &= ~CONF_FLAGS_LAZY_LINK)
#define IsConfAllowAutoConn(x)  ((x)->flags & CONF_FLAGS_ALLOW_AUTO_CONN)
#define SetConfAllowAutoConn(x)	((x)->flags |= CONF_FLAGS_ALLOW_AUTO_CONN)
#define ClearConfAllowAutoConn(x) ((x)->flags &= ~CONF_FLAGS_ALLOW_AUTO_CONN)
#define IsConfTemporary(x)      ((x)->flags & CONF_FLAGS_TEMPORARY)
#define SetConfTemporary(x)     ((x)->flags |= CONF_FLAGS_TEMPORARY)
#define IsConfRedir(x)          ((x)->flags & CONF_FLAGS_REDIR)
#define IsConfAwayBurst(x)      ((x)->flags & CONF_FLAGS_BURST_AWAY)
#define SetConfAwayBurst(x)     ((x)->flags |= CONF_FLAGS_BURST_AWAY)
#define ClearConfAwayBurst(x)   ((x)->flags &= ~CONF_FLAGS_BURST_AWAY)
#define IsConfTopicBurst(x)     ((x)->flags & CONF_FLAGS_TOPICBURST)
#define SetConfTopicBurst(x)    ((x)->flags |= CONF_FLAGS_TOPICBURST)
#define ClearConfTopicBurst(x)  ((x)->flags &= ~CONF_FLAGS_TOPICBURST)

/* shared/cluster server entry types 
 * These defines are used for both shared and cluster.
 */
#define SHARED_KLINE		0x0001
#define SHARED_TKLINE		0x0002
#define SHARED_UNKLINE		0x0004
#define SHARED_XLINE		0x0008
#define SHARED_TXLINE		0x0010
#define SHARED_UNXLINE		0x0020
#define SHARED_RESV		0x0040
#define SHARED_TRESV		0x0080
#define SHARED_UNRESV		0x0100
#define SHARED_LOCOPS           0x0200
#define SHARED_SERVICES         0x0400
#define SHARED_REHASH		0x0800
#define SHARED_ALL		(SHARED_KLINE | SHARED_TKLINE | SHARED_UNKLINE | \
				 SHARED_XLINE | SHARED_TXLINE | SHARED_UNXLINE | \
				 SHARED_RESV | SHARED_TRESV | SHARED_UNRESV |\
                                 SHARED_LOCOPS)

/* gline acl entry actions */
#define GDENY_BLOCK		0x1
#define GDENY_REJECT		0x2

struct config_file_entry
{
	const char *dpath;	/* DPATH if set from command line */
	const char *configfile;
	const char *klinefile;
	const char *xlinefile;
	const char *rxlinefile;
	const char *rklinefile;
	const char *dlinefile;
	const char *glinefile;
	const char *cresvfile;
	const char *nresvfile;

	char *logpath;
	char *operlog;

	char *servlink_path;
	char *egdpool_path;

	MessageFile motd;
	MessageFile opermotd;
	MessageFile linksfile;

	unsigned char compression_level;
	int gline_min_cidr;
	int gline_min_cidr6;
	int dot_in_ip6_addr;
	int dots_in_ident;
	int failed_oper_notice;
	int anti_spam_exit_message_time;
	int max_accept;
	int max_nick_time;
	int max_nick_changes;
	int ts_max_delta;
	int ts_warn_delta;
	int anti_nick_flood;
	int kline_with_reason;
	int warn_no_nline;
	int invisible_on_connect;
	int stats_e_disabled;
	int stats_o_oper_only;
	int stats_k_oper_only;
	int stats_i_oper_only;
	int stats_P_oper_only;
	int hide_killer;
	int short_motd;
	int no_oper_flood;
	int true_no_oper_flood;
	int oper_pass_resv;
	int glines;
	int hide_spoof_ips;
	int burst_away;
	int use_whois_actually;
	int tkline_expire_notices;
	int opers_bypass_callerid;
	int ignore_bogus_ts;
	char *kline_reason;
	int pace_wait;
	int pace_wait_simple;
	int gline_time;
	int gline_logging;
	int idletime;
	int oper_only_umodes;
	int oper_umodes;
	int max_targets;
	int caller_id_wait;
	int min_nonwildcard;
	int min_nonwildcard_simple;
	int kill_chase_time_limit;
	int default_floodcount;
	int client_flood;
	/* 0 == don't use throttle... */
	int throttle_time;
	int use_egd;
	int ping_cookie;
	int disable_auth;
	int disable_remote;
	char *cloak_key1;
	char *cloak_key2;
	char *cloak_key3;
	int enable_cloak_system;
	int anti_spam_connect_numeric;
	char *services_name;
#ifdef HAVE_LIBCRYPTO
	struct EncCapability *default_cipher_preference;
#endif
};

struct config_channel_entry
{
	int cycle_on_hostchange;
	int disable_fake_channels;
	int restrict_channels;
	int disable_local_channels;
	int use_except;
	int use_invex;
	int use_knock;
	int regex_bans;
	int knock_delay;
	int knock_delay_channel;
	unsigned int max_bans;
	unsigned int max_chans_per_user;
	int no_create_on_split;
	int no_join_on_split;
	int quiet_on_ban;
	int burst_topicwho;
	int default_split_server_count;
	int default_split_user_count;
};

struct config_server_hide
{
	int flatten_links;
	int hide_servers;
	char *hidden_name;
	int links_delay;
	int links_disabled;
	int hidden;
	int disable_hidden;
	int hide_server_ips;
};

struct server_info
{
	char *name;
	char *description;
	char *network_name;
	char *network_desc;
#ifdef HAVE_LIBCRYPTO
	char *rsa_private_key_file;
	RSA *rsa_private_key;
	SSL_CTX *ctx;
#endif
	char *sid;
	int hub;
	struct irc_ssaddr ip;
	struct irc_ssaddr ip6;
	int max_clients;
	int specific_ipv4_vhost;
	int specific_ipv6_vhost;
	struct sockaddr_in dns_host;
	int can_use_v6;
};

struct admin_info
{
	char *name;
	char *description;
	char *email;
};

struct logging_entry
{
	unsigned int use_logging;
	char operlog[PATH_MAX + 1];
	char userlog[PATH_MAX + 1];
	char glinelog[PATH_MAX + 1];
	char ioerrlog[PATH_MAX + 1];
	char klinelog[PATH_MAX + 1];
	char killlog[PATH_MAX + 1];
	char operspylog[PATH_MAX + 1];
	char failed_operlog[PATH_MAX + 1];
};

extern int ypass;
extern dlink_list class_items;
extern dlink_list server_items;
extern dlink_list cluster_items;
extern dlink_list hub_items;
extern dlink_list rxconf_items;
extern dlink_list rkconf_items;
extern dlink_list leaf_items;
extern dlink_list temporary_klines;
extern dlink_list temporary_dlines;
extern dlink_list temporary_glines;
extern dlink_list temporary_xlines;
extern dlink_list temporary_rxlines;
extern dlink_list temporary_rklines;
extern struct logging_entry ConfigLoggingEntry;
extern struct config_file_entry ConfigFileEntry;	/* defined in ircd.c */
extern struct config_channel_entry ConfigChannel;	/* defined in channel.c */
extern struct config_server_hide ConfigServerHide;	/* defined in s_conf.c */
extern struct server_info ServerInfo;	/* defined in ircd.c */
extern struct admin_info AdminInfo;	/* defined in ircd.c */
extern int valid_wild_card(struct Client *, int, int, ...);
/* End GLOBAL section */

extern unsigned long get_sendq(struct Client *);
extern const char *get_client_class(struct Client *);
extern int get_client_ping(struct Client *, int *);
extern void check_class(void);
extern void init_class(void);
extern struct ConfItem *find_class(const char *);
extern void init_ip_hash_table(void);
extern void count_ip_hash(int *, unsigned long *);
extern void remove_one_ip(struct irc_ssaddr *);
extern struct ConfItem *make_conf_item(ConfType type);
extern void free_access_item(struct AccessItem *);
extern void read_conf_files(int);
extern int attach_conf(struct Client *, struct ConfItem *);
extern int attach_connect_block(struct Client *, const char *, const char *);

extern int detach_conf(struct Client *, ConfType);

extern struct ConfItem *find_conf_name(dlink_list *, const char *, ConfType);
extern struct ConfItem *find_conf_exact(ConfType, const char *, const char *, const char *);
extern struct AccessItem *find_kill(struct Client *);
extern struct AccessItem *find_gline(struct Client *);
extern int conf_connect_allowed(struct irc_ssaddr *, int);
extern char *oper_privs_as_string(const unsigned int);
extern void split_nuh(struct split_nuh_item *);
extern struct ConfItem *find_matching_name_conf(ConfType, const char *,
						const char *, const char *, int);
extern struct ConfItem *find_exact_name_conf(ConfType, const char *, const char *, const char *);
extern void delete_conf_item(struct ConfItem *);
extern void report_confitem_types(struct Client *, ConfType, int);
extern void yyerror(const char *);
extern int conf_yy_fatal_error(const char *);
extern int conf_fbgets(char *, unsigned int, FBFILE *);
extern void write_conf_line(struct Client *, struct ConfItem *, const char *, time_t);
extern int remove_conf_line(ConfType, struct Client *, const char *, const char *);
extern void add_temp_line(struct ConfItem *);
extern void cleanup_tklines(void *);
extern const char *get_conf_name(ConfType);
extern int rehash(int);
extern int conf_add_server(struct ConfItem *, const char *);
extern void conf_add_class_to_conf(struct ConfItem *, const char *);
extern void conf_add_d_conf(struct AccessItem *);

/* XXX consider moving these into csvlib.h */
extern void parse_csv_file(FBFILE *, ConfType);

extern char *get_oper_name(const struct Client *);

extern void *map_to_conf(struct ConfItem *);
extern struct ConfItem *unmap_conf_item(void *);
/* XXX should the parse_aline stuff go into another file ?? */
#define AWILD 0x1		/* check wild cards */
#define NOUSERLOOKUP 0x2	/* Don't lookup the user@host on /rkline nick */
extern int parse_aline(const char *, struct Client *, int, char **,
		       int, char **, char **, time_t *, char **, char **);
extern int valid_comment(struct Client *, char *, int);

/* XXX */
extern int yylex(void);

#define TK_SECONDS 0
#define TK_MINUTES 1
extern time_t valid_tkline(char *, int);
extern int match_conf_password(const char *, const struct AccessItem *);

#define NOT_AUTHORIZED    (-1)
#define I_LINE_FULL       (-2)
#define TOO_MANY          (-3)
#define BANNED_CLIENT     (-4)
#define TOO_FAST          (-5)

#define CLEANUP_TKLINES_TIME 60

extern void cluster_a_line(struct Client *, const char *, int, int, const char *, ...);
extern void rebuild_cidr_class(struct ConfItem *, struct ClassItem *);

#endif /* INCLUDED_s_conf_h */
